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Item details

Condition: New

Number of pieces: 2

Type: Knock (knock) r

Part Number: 12570125

Exchange part number: 12570125

Other part numbers: 12570125

Decoration type: direct replacement

Warranty: 1 year

Fit for :

BUICK ENVISION 2016

BUICK REGAL 2014-2016

CADILLAC ATS 2013-2016

CADILLAC CT6 2016

CADILLAC CTS 2014-2016

CADILLAC ESCALADE 2015-2016

CHEVROLET CAMARO 2016

CHEVROLET COLORADO 2015-2016

CHEVROLET CORVETTE 2014-2016

CHEVROLET IMPALA 2014-2016

CHEVROLET MALIBU 2013-2015

CHEVROLET MALIBU LIMITED 2016

CHEVROLET SIERADO 1500 2014-2016

CHEVROLET SIERADO 2500 2014-2016

CHEVROLET SIERADO 3500 2015-2016

CHEVROLET SUBUN 1500 2014

CHEVROLET TAHOE 2015-2016

GMC CANYON 2015-2016

GMC SIERRA 1500 2014-2016

ant:

1. Please carefully check the appearance of the product when purchasing, whether the model is the same as your acceories.

2. If you have the part number, please compare before buying

3. If you are not sure whether it is the same, you can provide the acceory model and picture to contact us.

4. Please note that when installing electronic spare parts, component protectio

The princle of knock r (this information is for reference)

1. Knock rs are AC signal generators, but they are very different from most other automotive AC signal generators. In addition to detecting the speed and position of the rotating shaft like magnetoelectric crankshaft and haft position rs, they also detect vibration or Mechanical preure. Unlike stators and magneto-resistors, they are usually piezoelectric devices. They are made of special materials that can sense mechanical preure or vibration (for example, an AC voltage can be generated when the engine knocks).

2. Engine knock caused by premature ignition, poor exhaust gas recirculation, low-grade fuel, etc. will cause engine damage. The knock r provides a knock signal to the computer (some pa-through point control modes), so that the computer can readjust the ignition timing to prevent further knocking. They actually act as "oxygen rs" in the ignition timing feedback control loop.

3. Knock rs are placed in different positions of the engine block or cylinder. When vibration or knocking occurs, it produces a small voltage peak, the greater the knocking or vibration. The greater the main peak of knock r production. A certain high frequency indicates knocking or knocking. Knock rs are usually designed to measure frequencies in the range of 5 to 15 kilohertz. When the control unit receives these frequencies, the computer re-corrects the ignition timing to prevent further knocking. The knock r is usually very durable. So the r will only be damaged due to its own fai.

4. When the engine knocks, a preure wave is generated, the frequency of which is 1-10KHZ. The preure wave is transmitted to the cylinder body, causing the metal particles to produce vibration acceleration. The accelerometer knock r detects knock by measuring the vibration acceleration on the surface of the cylinder body The strength of the preure. Premature ignition time is one of the main reasons for knocking. Since the engine is required to emit maximum power, in order to not lose engine power, there is no knocking, a knock r is installed to make the electronic control device automatically adjust the ignition time.

About shping
Shping and Packaging All it will be double checked and well packed before sending.It will be dispatched within 2 business days after buyers pay for the order. It usually takes about 14 to 18 working days for delivering the package to the destination(for e areas,it may take a little longer). 

Special Announcement:
Please fill in the correct and detailed consignee, address and phone number in the order. For fast and correct delivery.If you do not receive order within 30 working days,please feel free to contact Customer Service before leaving Negative and Neutral Feedback, we will do our best to help you resoe the problem.TaxNo, you will only pay what is quoted as total cost at checkout, no more. You are not expected to pay any additional duties or taxes. If you are asked by Customs or our logistic partner to pay duties, please contact our Customer Service .

Your 100% satisfaction is very ant to us
If the product is not on good condition, You can return this product within 14 working days, please contact customer service center before returning.FeedbackYour satisfaction is our first priorityIf you receive the order and it is in good condition,we would be grateful if you would leave us 5 star Positive Feedback for the transaction.